linux-kernel - [RFC PATCH 6/6] ARM: EXYNOS: use the core cpu hotplug functions

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Date:	Mon, 20 May 2013 12:03:28 +0530
From:	Sanjay Singh Rawat <sanjay.rawat@...aro.org>
To:	linux-arm-kernel@...ts.infradead.org
Cc:	linux-kernel@...r.kernel.org, linaro-dev@...ts.linaro.org,
	Sanjay Singh Rawat <sanjay.rawat@...aro.org>
Subject: [RFC PATCH 6/6] ARM: EXYNOS: use the core cpu hotplug functions

Generic arm cpu hotplug related functions are moved to core hotplug code,
Exynos-4 is having Cortex-A9, remove the functions from the platform code.

Signed-off-by: Sanjay Singh Rawat <sanjay.rawat@...aro.org>
---
 arch/arm/mach-exynos/hotplug.c |   40 ++--------------------------------------
 1 file changed, 2 insertions(+), 38 deletions(-)

diff --git a/arch/arm/mach-exynos/hotplug.c b/arch/arm/mach-exynos/hotplug.c
index af90cfa..3489760 100644
--- a/arch/arm/mach-exynos/hotplug.c
+++ b/arch/arm/mach-exynos/hotplug.c
@@ -21,30 +21,10 @@
 
 #include <mach/regs-pmu.h>
 #include <plat/cpu.h>
+#include <asm/hotplug.h>
 
 #include "common.h"
 
-static inline void cpu_enter_lowpower_a9(void)
-{
-	unsigned int v;
-
-	asm volatile(
-	"	mcr	p15, 0, %1, c7, c5, 0\n"
-	"	mcr	p15, 0, %1, c7, c10, 4\n"
-	/*
-	 * Turn off coherency
-	 */
-	"	mrc	p15, 0, %0, c1, c0, 1\n"
-	"	bic	%0, %0, %3\n"
-	"	mcr	p15, 0, %0, c1, c0, 1\n"
-	"	mrc	p15, 0, %0, c1, c0, 0\n"
-	"	bic	%0, %0, %2\n"
-	"	mcr	p15, 0, %0, c1, c0, 0\n"
-	  : "=&r" (v)
-	  : "r" (0), "Ir" (CR_C), "Ir" (0x40)
-	  : "cc");
-}
-
 static inline void cpu_enter_lowpower_a15(void)
 {
 	unsigned int v;
@@ -74,22 +54,6 @@ static inline void cpu_enter_lowpower_a15(void)
 	dsb();
 }
 
-static inline void cpu_leave_lowpower(void)
-{
-	unsigned int v;
-
-	asm volatile(
-	"mrc	p15, 0, %0, c1, c0, 0\n"
-	"	orr	%0, %0, %1\n"
-	"	mcr	p15, 0, %0, c1, c0, 0\n"
-	"	mrc	p15, 0, %0, c1, c0, 1\n"
-	"	orr	%0, %0, %2\n"
-	"	mcr	p15, 0, %0, c1, c0, 1\n"
-	  : "=&r" (v)
-	  : "Ir" (CR_C), "Ir" (0x40)
-	  : "cc");
-}
-
 static inline void platform_do_lowpower(unsigned int cpu, int *spurious)
 {
 	for (;;) {
@@ -144,7 +108,7 @@ void __ref exynos_cpu_die(unsigned int cpu)
 	if ((primary_part & 0xfff0) == 0xc0f0)
 		cpu_enter_lowpower_a15();
 	else
-		cpu_enter_lowpower_a9();
+		cpu_enter_lowpower();
 
 	platform_do_lowpower(cpu, &spurious);
 
-- 
1.7.9.5

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